According to the National Environment Agency (NEA), the highest rainfall recorded as at 5.30 pm was 91.4 mm at Kent Ridge in the West Coast area of Singapore.
The afternoon heavy downpour caused a canal at Block 611 in Clementi West to overflow. One resident at the area said he's never seen anything like this in all his 10 years living there. "When I saw it, I find it very dangerous, because the volume of water was huge; it carried a mass of water, and the current was moving very fast and splashed very strong waves on to the bridge here," said Mr Lim, a Clementi West resident.
Mr Lim said the flood lasted for about 45 minutes. He said: "All the small drains are all submerged and the water splashed into the HDB block, and all the trees, plants are all half submerged." National water agency PUB said the flash floods were due to the intense rainfall and high tide of about 3 metres on Saturday afternoon. And this was what caused the Sungei Pandan Kechil canal to overflow. Flash floods also occurred along the AYE towards ECP and at Neo Pee Teck Lane, but they subsided within 20 minutes.
The flash floods along the AYE towards ECP caused two lanes to be affected while one lane remained passable. PUB said the length of the affected section was about 100m and water depth was about 15cm. At Neo Pee Teck Lane, two lanes were affected. The length of the affected section was about 90m and water depth was about 30cm. Water from the road went into the porch of two houses there. The area is a flood-prone area and PUB has already scheduled drainage improvement works there. The works will start in the first quarter of 2012. PUB said Saturday's downpour peaked at 1.20pm - 1.50pm during which 52.6mm of rain fell. The rate of rainfall peak intensity during this period was about 105.2mm/hr. - Channel News Asia.